Overload yaw prevention method and wind driven generator

Abstract

The invention relates to an overload yaw preventing method and system. The overload yaw preventing system comprises a first connecting part and a second connecting part which are arranged in a mutually rotating mode. A driving assembly is arranged between the first connecting part and the second connecting part; the driving assembly actively acts, so that the first connecting part and the second connecting part relatively rotate; the driving assembly comprises a lever arm; the lever arm is connected with a fixed fulcrum, a large arm and a small arm; the big arm adopts a driving rod piece; the small arm adopts a driven rod; the driven rod is hinged with a clamping seat piece; and when the root part of the driving rod piece is hinged to the first connecting part or the second connecting part, the clamping seat piece intermittently clamps the second connecting part or the first connecting part to act. The device is reasonable in design, compact in structure and convenient to use.

Description

Technical Field

[0001] The invention relates to an overload yaw prevention method and a wind driven generator. Background Art

[0002] The yaw system is one of the core components of a wind turbine, which enables the nacelle to rotate according to the wind direction. At present, the yaw system mainly adopts mechanical transmission, but the mechanical transmission generally adopts gear transmission.

[0003] The yaw system of the wind turbine uses a motor and a reducer with a low-speed, heavy-loaded large gear. If the gear is driven, it is easy to break teeth during the reversing process, which will also cause damage to the reducer. If the above components are damaged, the wind turbine needs to be shut down for large-scale disassembly, repair and replacement.

[0004] In the previous connecting rod yaw system, although it can overcome the above-mentioned gear defects, it still has the problem that the yaw drive needs to be aligned, the bearing diameter is small, and it cannot support yaw more effectively. Summary of the invention

[0005] The technical problem to be solved by the present invention is generally to provide an overload-proof yaw method and a wind turbine.

[0006] To solve the above problems, the technical solution adopted by the present invention is:

[0007] In order to improve the existing yaw process, an overload prevention yaw method is provided for a wind turbine. The method comprises the following steps:

[0008] Step 1: The movable plate clamps the card seat;

[0009] Step 2: The driving assembly moves forward, so that the first connecting part and the second connecting part rotate relative to each other;

[0010] Step 3, the movable plate releases the card seat;

[0011] Step 4: The driving assembly moves in the reverse direction, so that the first connecting part and the second connecting part rotate relative to each other.

[0012] As a further improvement of the above technical solution:

[0013] In order to achieve the snap connection, in step one, the movable plate is clamped with the snap-fit ​​piece.

[0014] In order to realize intermittent yaw drive, in step 2, the driving rod is driven in the forward direction, and the driven rod is driven to swing through the lever arm, so that the seat member moves forward around the arc to the end of the stroke, driving the rotating member to rotate synchronously.

[0015] To achieve driving again, in step three, the movable plate is separated from the clamping member.

[0016] In order to realize the return stroke, in step 4, the driving rod is driven in the reverse direction, and the driven rod is driven to swing through the lever arm, so that the seat part retreats around the arc to the starting point of the stroke.

[0017] For overall yaw, when the second connection part comprises a rotating member, the second connection part is connected to the nacelle and the supporting member is connected to the tower.

[0018] When the first connection part and the second connection part rotate relatively, the rotating member rotates relative to the supporting member through the wear-resistant pad.

[0019] In order to achieve better and safer yaw and prevent overload, in step 2 and step 4, when the clamping member adopts a steel ball;

[0020] The driving rod is telescopic to drive the lever arm to swing, and drives the clamping seat through the driven rod, so that the front end of the N-type clamp moves in an arc on the rotating part or the supporting part and / or the L-type clamp moves along the arc of the inner guide ring.

[0021] When the clamping parts use steel balls, if any of the steel balls is damaged, replace it.

[0022] An overload-proof wind turbine generator comprises a tower, a nacelle and an overload-proof yaw unit arranged between the tower and the nacelle;

[0023] The first connection portion is connected to the tower or the nacelle and the second connection portion is connected to the nacelle or the tower;

[0024] A first connecting portion and a second connecting portion are arranged to rotate with each other; a driving component is arranged between the first connecting portion and the second connecting portion;

[0025] The driving component actively moves to make the first connecting part and the second connecting part rotate relative to each other;

[0026] The driving assembly includes a lever arm; the lever arm is connected with a fixed fulcrum, a large arm and a small arm;

[0027] The big arm adopts the driving rod; the small arm adopts the driven rod;

[0028] The driven rod is hinged with a card seat piece;

[0029] When the root of the driving rod is hinged on the first connecting part or the second connecting part, the clamping seat intermittently clamps the second connecting part or the first connecting part.

[0030] In order to achieve yaw, an anti-overload yaw unit includes a first connecting part and a second connecting part which are arranged to rotate with each other; a driving component is arranged between the first connecting part and the second connecting part;

[0031] The driving component actively moves to make the first connecting part and the second connecting part rotate relative to each other;

[0032] The driving assembly includes a lever arm; the lever arm is connected with a fixed fulcrum, a large arm and a small arm;

[0033] The big arm adopts the driving rod; the small arm adopts the driven rod;

[0034] The driven rod is hinged with a card seat piece;

[0035] When the root of the driving rod is hinged on the first connecting part or the second connecting part, the clamping seat intermittently clamps the second connecting part or the first connecting part.

[0036] As a further improvement of the above technical solution:

[0037] For overall connection, the fixed fulcrum is hinged on the first connecting part or the second connecting part;

[0038] The first connection portion is used to connect to the tower or the nacelle and the second connection portion is used to connect to the nacelle or the tower.

[0039] In order to realize motion control, when the clamping member returns, the clamping member is separated from the second connecting part or the first connecting part and returns to the starting position;

[0040] The driving component is located in the inner cavity of the first connecting part or the second connecting part.

[0041] In order to realize the return stroke control, when the clamping member moves forward, the clamping member is clamped and connected with the second connecting part or the first connecting part, and drives the second connecting part or the first connecting part to rotate at a set angle;

[0042] The card seat member is guided on the second connecting part or the first connecting part and moves along the arc;

[0043] In order to reduce the volume, the driving rod is telescopically driven to drive the lever arm to swing, and the seat member is driven to move in an arc through the driven rod.

[0044] When the second connection part includes a support member or a rotating member, the first connection part includes a rotating member or a support member.

[0045] In order to expand the swing range of the mechanism, a plurality of connecting lugs A and connecting lugs B are provided on the support member;

[0046] The rotating member includes a connecting flange portion;

[0047] A clamping member is arranged on the rotating member, an annular groove is arranged on the rotating member, and an inner guide ring is arranged on the inner side wall of the rotating member;

[0048] The driving rod is hinged to the connecting lug A through the hinge axis A, and the lever arm is hinged to the connecting lug B through the hinge axis B;

[0049] The driven rod is hinged between the lever arm and the card seat part.

[0050] In order to improve the installation process and increase the overall service life, a number of platter pieces are distributed in the annular groove;

[0051] The clamping part is a sphere or a cylinder or a combination of a spherical cap and a cylinder;

[0052] The snap-on piece is on the platter piece;

[0053] The connector is a wearing part.

[0054] In order to achieve overall limiting and guiding, the clamping seat comprises an n-type clamping head and an L-type clamping head arranged below the n-type clamping head;

[0055] The front end of the n-type clamp is clamped on the rotating part or the supporting part;

[0056] A movable plate is provided in the groove of the n-type clamp for lifting and lowering;

[0057] The movable plate is in pressure contact, snap contact, electromagnetic contact and / or friction contact with the clamping part;

[0058] Side baffles are provided on both sides of the n-type clamp;

[0059] A clamping rod is provided between the horizontal plate and the movable plate of the n-type clamp;

[0060] A circumferential groove is provided on the vertical plate of the L-shaped clamp, and the circumferential groove is adapted to the inner guide ring;

[0061] A plurality of mounting grooves are distributed on the support member, and wear-resistant pads are installed in the mounting grooves;

[0062] A contact surface is provided on the rotating member for contacting the wear-resistant pad;

[0063] When the clamping member is a steel ball or a ball crown and a column assembly, the lower part of the clamping member is arranged in the platter, and a plurality of holes are arranged on the movable plate for engaging the upper part of the clamping member exposed on the upper surface of the platter after the movable plate is lowered;

[0064] When the clamping member is a steel ball, the distance from the top of the steel ball to the upper surface of the platter member is greater than 1 / 2 of the radius of the steel ball and less than 3 / 4 of the radius of the steel ball.

[0065] The contact surface is below the connecting flange; an annular groove is arranged on the upper part of the connecting flange, and the inner guide ring is in the inner hole of the annular groove.

[0066] In order to achieve overall protection, a system is provided, comprising the above-mentioned anti-overload yaw unit.

[0067] The present invention avoids the technical problem of broken gear teeth; it also avoids the technical problem of the drive pin being stuck and unable to be removed, unable to be aligned, and the pin being twisted. It integrates the brake and the yaw together to avoid overload engagement. Since the drive part is arranged in the inner cavity, the outer volume is reduced and the width limitation problem in the transportation of components is solved, especially on highways or underpasses. The drive part is arranged inside the tower body, which is convenient for repair and maintenance.

[0068] When external force acts, especially when the oil cylinder is damaged, the steel ball crown is used to achieve overload protection to avoid jamming and damage to other components. The steel ball is used as a wearing part to reduce maintenance costs. During maintenance, only the damaged steel ball needs to be replaced.

[0069] The invention has reasonable design, low cost, durability, safety and reliability, simple operation, time and labor saving, money saving, compact structure and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 It is a schematic diagram of the yaw use structure of the present invention.

[0071] Figure 2 It is a schematic diagram of the structure of the rotating part of the present invention.

[0072] Figure 3 It is a schematic diagram of the contact surface structure of the present invention.

[0073] Figure 4 It is a schematic diagram of the structure of the connecting flange portion of the present invention.

[0074] Figure 5 It is a schematic diagram of the use structure of the lever arm of the present invention.

[0075] Figure 6 It is a schematic diagram of the structure of the driving component of the present invention.

[0076] Wherein: 1. first connecting part; 2. second connecting part; 3. driving assembly; 4. supporting part; 5. rotating part; 6. connecting lug A; 7. connecting lug B; 8. contact surface; 9. mounting groove; 10. wear-resistant pad; 11. connecting flange; 12. inner guide ring; 13. annular groove; 14. platter; 15. clamping part; 16. articulated shaft A; 17. driving rod; 18. lever arm; 19. articulated shaft B; 20. driven rod; 21. clamping seat; 22. side baffle; 23. movable plate; 24. n-type clamp; 25. L-type clamp; 26. circumferential groove; 27. clamping rod. DETAILED DESCRIPTION

[0077] like Figure 1-6As shown, the anti-overload yaw method and wind turbine of the present embodiment include an anti-overload yaw unit, specifically including a first connection part 1 and a second connection part 2 which are rotatably arranged with respect to each other, and its structure is not limited to the drawings, and may be a frame, a box or other similar structures, and may be an integral part or a split part; a drive assembly 3 is arranged between the first connection part 1 and the second connection part 2; this is the core store of the improvement of the present invention.

[0078] The driving assembly 3 actively moves so that the first connection part 1 and the second connection part 2 rotate relative to each other; the active movement is preferably hydraulically driven, and as an extension, in theory, it can also be electrically or mechanically driven.

[0079] The driving assembly 3 includes a lever arm 18; the lever arm 18 is connected to a fixed fulcrum, an upper arm and a lower arm; the present invention is a force-saving lever, and the example in the figure is to place the upper arm and the lower arm on the same side of the fulcrum. Compared with being arranged on both sides of the fulcrum, its structure is compact, so that the force arm can be fully utilized, that is, the upper arm also utilizes the force arm of the lower arm.

[0080] The big arm adopts a driving rod 17, which is preferably a linear drive and a conventional structure to achieve power input; the small arm adopts a driven rod 20 to achieve power output, which can be a straight rod, a curved rod, or other similar structures;

[0081] The driven rod 20 is hinged with a card seat 21 to realize the card connection drive. Of course, it can also be a frame.

[0082] When the root of the driving rod 17 is hinged on the first connecting part 1 or the second connecting part 2, the clamping member 21 intermittently clamps the second connecting part 2 or the first connecting part 1. This means that the upper part can be connected to the tower body and the lower part to the cabin; or the lower part can be connected to the tower body and the upper part to the cabin.

[0083] The fixed fulcrum is hinged on the first connecting part 1 or the second connecting part 2, so as to achieve fixed support;

[0084] The first connection part 1 is used for connecting to a tower or a nacelle and the second connection part 2 is used for connecting to a nacelle or a tower.

[0085] When the clamping member 21 returns, the clamping member 21 is separated from the second connecting portion 2 or the first connecting portion 1 by a clamping force and returns to the starting position;

[0086] The drive assembly 3 is located in the inner cavity of the first connecting part 1 or the second connecting part 2, which can greatly reduce the external volume and facilitate transportation. Under the same volume, a bearing with a larger turning radius can be installed, thereby increasing the service life of the bearing. It should be noted that in order to facilitate assembly, the prior art generally installs the drive assembly on the outside of the rotating bearing, because the outer gear ring is easier to process and manufacture than the inner gear ring, and the performance is better than the inner teeth. Therefore, the use of external teeth is a design thinking inertia, which leads to the prior art generally arranging the drive part on the outside.

[0087] When the clamping member 21 moves forward, the clamping member 21 is clamped and connected with the second connecting portion 2 or the first connecting portion 1, and drives the second connecting portion 2 or the first connecting portion 1 to rotate a set angle;

[0088] The card seat member 21 is guided on the second connecting portion 2 or the first connecting portion 1 and moves along the arc;

[0089] The driving rod 17 is telescopically driven to drive the lever arm 18 to swing, and drives the seat member 21 to move in an arc through the driven rod 20. The arc movement can be based on the constraint of the rotation member 5's own freedom, while retaining the rotation around the Z axis, or it can be achieved by setting an arc guide on the seat member 21. The former can simplify the structure, but it will apply an oblique force to the rotating member 5, causing the bearing connected to the rotating member to generate a normal component force, affecting its service life. If an arc guide is used, it can be a conventional structure such as a guide groove, so as to avoid applying an oblique force to the rotating member 5.

[0090] When the second connection part 2 includes the support member 4 or the rotating member 5, the first connection part 1 includes the rotating member 5 or the support member 4. Figure 5 However, as an extended protection, the rotating member 5 and the supporting member 4 can correspond to a part of the first connecting part 1 or the second connecting part 2, and both are within the protection scope.

[0091] A plurality of connecting lugs A6 and B7 are provided on the support member 4, so as to realize the support force points. Through the lug design, the structure can be optimized and the arc movement scale of the connecting rod can be increased.

[0092] As a specific introduction, the rotating member 5 includes a connecting flange portion 11, which can be a conventional flange and is not limited to the structure shown in the attached drawings;

[0093] As a step-by-step protection, a snap-fit ​​part 15 is provided on the rotating part 5. That is, in theory, the snap-fit ​​part is provided on the rotating part, which can be a protruding part or a concave part, both of which can be snapped. It is preferably a protruding part, so that the matching socket part 21 is a concave part; thereby balancing the service life of each component, because the socket part 21 is frequently used, while the snap-fit ​​part 15 is used intermittently, through intermittent use, the fatigue of the snap-fit ​​part 15 is relieved and the internal stress is released.

[0094] The driving rod 17 is hinged to the connecting lug A6 via the hinge axis A16, and the lever arm 18 is hinged to the connecting lug B7 via the hinge axis B19;

[0095] The driven rod 20 is hinged between the lever arm 18 and the seat member 21, so as to realize the connecting rod drive. This structure is a labor-saving lever with a preferred same-side force arm. Of course, in order to avoid the use of the levers with two side force arms in the present invention, which are equivalent in the upper concept, the levers with the same side force arms can greatly save space and realize a simplified structure, which is a further innovation of the levers with two side force arms.

[0096] An annular groove 13 is provided on the rotating member 5, and an inner guide ring 12 is provided on the inner wall of the rotating member 5, so as to achieve positioning, and also guide the constraint of the Z-axis up and down direction of the holder, the support of the holder member 21 and the radial outward limitation.

[0097] Although the clamping part 15 is used intermittently, it realizes the transmission of yaw rotation force during use and is subjected to huge force, especially at the moment of starting or stopping, when the inertia force is huge. A number of platter parts 14 are distributed in the annular groove 13, so as to facilitate installation and maintenance.

[0098] As an example, the clamping member 15 is a sphere or a cylinder or a combination of a spherical cap and a cylinder;

[0099] The clamping member 15 is on the platter member 14;

[0100] The clamping part 15 is a wearing part, so it is convenient to replace and greatly reduces the maintenance cost. At the same time, when a fault occurs, especially when it is overloaded, the clamping part is used as the one with the lowest safety factor, that is, it is damaged first, thereby ensuring the safety of other parts.

[0101] The card seat 21 includes an n-shaped card head 24 and an L-shaped card head 25 disposed below the n-shaped card head 24;

[0102] The front end of the n-type clamping head 24 is clamped on the rotating member 5 or the supporting member 4, thereby realizing reasonable restriction on the degree of freedom of the clamping seat member 21 and ensuring accurate travel.

[0103] A movable plate 23 is provided in the groove of the n-type clamp 24 to realize clamping. Compared with the lateral telescopic movement, it moves the travel space to the Z-axis direction, thereby reducing the horizontal lateral space, making it easier to install a larger bearing. At the same time, compared with the rotating annular surface, it is more convenient to manufacture and process, and the force direction is separated from the rotation driving force direction. The integration of braking and driving can be realized.

[0104] The movable plate 23 is in pressure contact, bite contact, electromagnetic contact and / or friction contact with the clamping member 15; as an innovation, a physical bite model is adopted to achieve good braking.

[0105] Side baffles 22 are provided on both sides of the n-type clamp head 24; since the clamping member 15 is a wearing part, if it is damaged during operation, it will fall and produce falling objects or enter other mechanisms, causing malfunctions. The side baffles 22 are used to prevent the broken parts from falling.

[0106] A clamping rod 27 is provided between the transverse plate of the n-type clamp 24 and the movable plate 23, so as to realize the driving movement, which can be electromagnetic, hydraulic or mechanical driving of the clamping rod 27 to move linearly, which can be a push rod, a screw rod, or an inclined wedge.

[0107] A circumferential groove 26 is provided on the vertical plate of the L-shaped clamp 25 , and the circumferential groove 26 is adapted to the inner guide ring 12 to achieve functions such as support or guidance.

[0108] A plurality of mounting grooves 9 are distributed on the support member 4, and wear-resistant pads 10 are installed in the mounting grooves 9;

[0109] A contact surface 8 is provided on the rotating member 5 for contacting the wear-resistant pad 10;

[0110] Conventional parts such as bearings may be provided on the support member 4 and the rotating member 5 .

[0111] When the clamping member 15 is a steel ball or a ball crown and a column assembly, the lower part of the clamping member 15 is arranged in the platter member 14, and a plurality of holes are arranged on the movable plate 23 for engaging the upper part of the clamping member 15 exposed on the upper surface of the platter member 14 after the movable plate 23 is lowered;

[0112] Preferably, the steel ball is used, so that the spherical surface can be used to realize flexible positioning, and at the same time, the spherical surface can be used to realize automatic overload prevention. By setting the limit pressure of the clamping rod 27 lower than the overload limit, when an overload occurs, when the clamping member 15 crosses the steel ball, it will move upward under the action of the spherical surface, thereby realizing separation by crossing the corresponding steel ball and avoiding jamming. It realizes multi-point positioning and bite through multiple steel balls.

[0113] Preferably, when the clamping member 15 is a steel ball, the distance from the top of the steel ball to the upper surface of the platter member 14 is greater than 1 / 2 of the radius of the steel ball and less than 3 / 4 of the radius of the steel ball, so as to achieve engagement and avoid slipping.

[0114] As a structural form, the contact surface 8 is below the connecting flange portion 11 ; an annular groove portion 13 is provided on the upper portion of the connecting flange portion 11 , and the inner guide ring 12 is in the inner hole of the annular groove portion 13 .

[0115] The system of this embodiment includes the above-mentioned anti-overload yaw unit, thereby achieving overall protection.

[0116] When the clamping member 15 is a steel ball, the clamping rod 27 is telescopically arranged, and the positive limit pressure of the clamping rod 27 is less than the vertical force component of the movable plate 23 and the spherical surface of the steel ball, the movable plate 23 passes over the spherical surface of the steel ball, and at the same time, the clamping rod 27 is retracted in the reverse direction.

[0117] like Figure 1-6 The anti-overload yaw method of this embodiment is used for a wind turbine generator, and the method comprises the following steps:

[0118] Step 1: The movable plate 23 clamps the card holder 21;

[0119] Step 2: The driving assembly 3 moves forward, so that the first connecting part 1 and the second connecting part 2 rotate relative to each other;

[0120] Step 3, the movable plate 23 releases the card holder 21;

[0121] Step 4: the driving assembly 3 moves in the reverse direction, so that the first connecting part 1 and the second connecting part 2 rotate relative to each other.

[0122] In step one, the movable plate 23 is clamped by the clamping member 15 .

[0123] In step 2, the driving rod 17 is driven in the forward direction, and the driven rod 20 is driven to swing through the lever arm 18, so that the seat member 21 moves forward along the arc to the end of the stroke, and drives the rotating member 5 to rotate synchronously.

[0124] In step three, the movable plate 23 is separated from the clamping member 15 .

[0125] In step 4, the driving rod 17 is driven in the reverse direction, and the driven rod 20 is driven to swing through the lever arm 18, so that the seat member 21 retreats around the arc to the starting point of the stroke.

[0126] When the second connection part 2 includes the rotating member 5, the second connection part 2 is connected to the nacelle, and the supporting member 4 is connected to the tower.

[0127] When the first connecting part 1 and the second connecting part 2 rotate relative to each other, the rotating member 5 rotates relative to the supporting member 4 via the wear-resistant pad 10 .

[0128] In step 2 and step 4, when the clamping member 15 is a steel ball;

[0129] The driving rod 17 telescopes to drive the lever arm 18 to swing, and drives the base member 21 through the driven rod 20, so that the front end of the N-type chuck 24 moves in an arc on the rotating member 5 or the supporting member 4 and / or the L-type chuck 25 moves in an arc along the inner guide ring 12.

[0130] When the clamping member 15 adopts a steel ball, if any of the steel balls is damaged, it should be replaced.

[0131] The overload-proof wind turbine of this embodiment includes a tower, a nacelle, and an overload-proof yaw unit disposed between the tower and the nacelle;

[0132] The first connection part 1 is connected to the tower or the nacelle and the second connection part 2 is connected to the nacelle or the tower;

[0133] A first connecting part 1 and a second connecting part 2 are arranged to rotate with each other; a driving component 3 is arranged between the first connecting part 1 and the second connecting part 2;

[0134] The driving assembly 3 actively moves to make the first connecting part 1 and the second connecting part 2 rotate relative to each other;

[0135] The driving assembly 3 includes a lever arm 18; the lever arm 18 is connected with a fixed fulcrum, a large arm and a small arm;

[0136] The big arm adopts a driving rod 17; the small arm adopts a driven rod 20;

[0137] The driven rod 20 is hinged with a card seat member 21;

[0138] When the root of the driving rod 17 is hinged to the first connecting part 1 or the second connecting part 2 , the clamping member 21 intermittently clamps the second connecting part 2 or the first connecting part 1 .

[0139] The present invention realizes the relative rotation of the first connecting part 1 and the second connecting part 2 through the driving component 3, the support member 4 realizes the support and provides the counter-support force, the rotating member 5 realizes the rotational yaw, the connecting lug A6 and the connecting lug B7 realize the support, the contact surface 8, the mounting groove 9, and the wear-resistant pad 10 realize the rotational support, which can be rotated through the bearing, the connecting flange part 11 realizes the connection with other parts, the inner guide ring 12 realizes the guidance, and the annular groove part 13 realizes the installation of the platter part 14, thereby fixing the clamping part 15, and realizing the yaw action of the connecting rod driving the card seat part 21 through the hinge shaft A16, the driving rod 17, the lever arm 18, the hinge shaft B19, and the driven rod 20, and realizing the side block through the side baffle plate 22. It can be equipped with a dustproof component, the clamping rod 27 realizes clamping through the movable plate 23, the n-type clamp 24, the L-type clamp 25, and the circumferential groove 26 realize the guide support.

[0140] The present invention is fully described for a clearer disclosure, and the prior art is not listed one by one.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents; it is obvious for those skilled in the art to combine multiple technical solutions of the present invention. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention. The technical contents not described in detail in the present invention are all known technologies.

Claims

1. A method for preventing overload yaw, characterized in that: For use in a wind turbine, the method comprises the following steps, Step 1: The movable plate (23) clamps the card holder (21); Step 2: the driving assembly (3) moves in a positive direction, so that the first connecting part (1) and the second connecting part (2) rotate relative to each other; Step 3, the movable plate (23) releases the card holder (21); Step 4: the driving assembly (3) moves in the reverse direction, so that the first connecting part (1) and the second connecting part (2) rotate relative to each other.

2. The overload yaw prevention method according to claim 1, characterized in that: In step one, the movable plate (23) is clamped with the clamping member (15).

3. The overload yaw prevention method according to claim 1, characterized in that: In step 2, the driving rod (17) is driven in the forward direction, and the driven rod (20) is driven to swing through the lever arm (18), so that the seat member (21) moves forward along an arc to the end of the stroke, driving the rotating member (5) to rotate synchronously.

4. The overload yaw prevention method according to claim 1, characterized in that: In step three, the movable plate (23) is separated from the clamping member (15).

5. The overload yaw prevention method according to claim 1, characterized in that: In step 4, the driving rod (17) is driven in the reverse direction, and the driven rod (20) is driven to swing through the lever arm (18), so that the seat member (21) moves back around the arc to the starting point of the stroke.

6. The overload yaw prevention method according to any one of claims 1 to 5, characterized in that: When the second connection part (2) includes a rotating member (5), the second connection part (2) is connected to the nacelle, and the support member (4) is connected to the tower.

7. The overload yaw prevention method according to claim 6, characterized in that: When the first connecting part (1) and the second connecting part (2) rotate relative to each other, the rotating member (5) rotates relative to the supporting member (4) via the wear-resistant pad (10).

8. The overload yaw prevention method according to claim 7, characterized in that: In step 2 and step 4, when the clamping member (15) is a steel ball; The driving rod (17) is telescopically driven to drive the lever arm (18) to swing, and the clamping seat (21) is driven through the driven rod (20), so that the front end of the N-type clamping head (24) moves in an arc on the rotating member (5) or the supporting member (4) and / or the L-type clamping head (25) moves in an arc along the inner guide ring (12).

9. The overload yaw prevention method according to claim 8, characterized in that: When the clamping member (15) adopts a steel ball, if the steel ball is damaged, the steel ball should be replaced.

10. An overload-proof wind turbine generator, characterized in that: It includes a tower, a nacelle and an anti-overload yaw unit arranged between the tower and the nacelle; The first connection part (1) is connected to the tower or the nacelle and the second connection part (2) is connected to the nacelle or the tower; A first connecting part (1) and a second connecting part (2) are arranged to rotate with each other; a driving component (3) is arranged between the first connecting part (1) and the second connecting part (2); The driving component (3) actively moves to cause the first connecting part (1) and the second connecting part (2) to rotate relative to each other; The driving assembly (3) comprises a lever arm (18); the lever arm (18) is connected with a fixed fulcrum, a large arm and a small arm; The big arm adopts a driving rod (17); the small arm adopts a driven rod (20); The driven rod (20) is hingedly connected with a seat member (21); When the root of the driving rod (17) is hinged on the first connecting part (1) or the second connecting part (2), the clamping seat (21) intermittently clamps the second connecting part (2) or the first connecting part (1).

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